hexahydro-(3R,3aS,6aR)-furo[2,3-b]furan-3-ol CAS#156928-09-5 purity: 99%min; single impurity: 0.5%max; total impurity: 1%max hexahydro-(3R,3aS,6aR)-furo[2,3-b]furan-3-olCAS#156928-09-5purity: 99%min; single impurity: 0.5%max; total impurity: 1%max application: darunavir intermediate, brecanavir intermediate